/* 响应式布局样式 - start */

/* 响应式布局样式 - end */

html, body {
    width: 100%;
}
body, ul, li, h1, h2, h3, h4, h5, h6, p {
    padding: 0;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
}

em, i {
    font-style: normal;
}

h1,h2,h3,h4,h5,h6 {
    margin: 0;
    font-weight: normal;
}

input,button {
    border: none;
    outline: none;
}

button {
    cursor: pointer;
}

.flex {
    display: flex;
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-column {
    flex-direction: column;
}

.w {
    width: 1100px;
    margin: 0 auto;
}

.align-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

a {
    text-decoration: none;
    color: black;
}

img {
    object-fit: cover;
    vertical-align: middle;
}

li {
    list-style: none;
}